Disable stack protector and stack variable initialization for crt objects

Most of the crt objects are simple enough that stack protection and
stack variable initialization don't occur, but rcrt1.c needs them
disabled.  rcrt1.o wasn't previously used, but the rustc build uses
it.  Disable stack protector and stack variable initialization for all
crt objects to future proof them.

Bug: 216192129
Test: rustc builds
Change-Id: Icec48575890d897390c7705eeeb3e1cf29232324
1 file changed